Composition of matter for capping pulps in teeth and improvements in dental filling materials



Patented Mar. 22, 1927.

UNITED STATES.

PATENT OFFICE.

PAUL W. IBUGEB, OI AZITALA GO'UNTY, MISSISSIPPI.

OOIPOSITIOK OI BATTER FOB CAPPING PULPB IN TEETH AND IKIBOVEIBNTB mDENTAI. FILLING MATERIALS.

Io Drawing.

material or wax without t e necessity ofapplication of heat or use ofsolvents.

Furthermore, an object 1s to provide in such a composition germicidal orother additional r uisites for sterilization or treatment of t e cavitysurface or surroundmg tissue.

M composition though placed at-once in a tootli cavity, in itscompos1t1on form and conveniently so, without applicatlon of heat or useof volatlle solvents, and though confined at once as part of a permanentrestoration under the superimposed or' external filling that may becompleted to full restoratron at once, supplies a coatlng of waxy materal or wax formed into coalescent continulty graduall in situ. Germicidalor medicinal action continues during the formation of the coating intocoalesced structure as diffusion of the fluid or germicidal ingredlentsfrom the confined composition occurs into surrounding tissue or partlallmto superimposed cement. A germici al preliminary treatment is notnecessary as in the case of waxes applied with heat.

I accomplish an object of my invention of forming a continuous coatingof such substances in a tooth cavity in the followin way which describesthe composition an explains the principle thereof. If a wax or othercohesive material of coalescing property, or a solid wax such asbees-wax or parafline wax or similar wax is made into a finely dividedform and is left lie with the particles in contact for a length of timeat ordinary atmospheric temperature, the particles in direct contactwill gradually in time coalesce b cohesion and form a mam of continuity0 structure or of solidity of form of the substance, or essentially so.The coalescing tendency is increased at a temperature corresponding tothe human body temperature as in a tooth cavity.

My invention is a compositionof matter containing a wax or a material ofcoalescing property, or preferably a hard or solid wax Application filedAugust 11, 1924. Serial 10. 731,488.

or waxy acting material in finely divided or loose form, kept fromcoalescing and ke t separated in fine y divided or loose form y anappropriate material suitable for dental uses, or by an appropriatemedicinal or germicidal fluid which may diffuse into human tissue whenplaced in a tooth cavity,

.mixed with it in such a way as to hold the particles of said wax orwaxy material from coalescing or keep the composition in its form offluidity. Such separating material or substances must necessarily be ofa kind that do not dissolve the waxy or other coalescing substance or atleast that do not dlssolve it to an extent that appreciably alters theworking of the composition. The words non-solvent herein in thespecification and claims are meant as covering li uids or fluids withinthese workable limitations.

As a matter of choice for the waxy substance, I use paraiiine wax as itis a wax partlcularly adapted to permanent contact with live humantissue, and I prefer to use the solid wax, .that has a melting pointaround fifty degrees centigrade, on account ofreadily, coalescing intocontinuity of form when particles or surfaces of the wax lie in directcontact at human body temperature For the material to separate thefinely divided waxy substance or hold its surfaces from coalescing, Iuse for a purpose of disinfection, antiseptic and medicinal action anappropriate germicidal fluid or germicidal substances in which thefinely divided, waxy substance does not dissolve and with which it iskept from coalescing. As an appropriate germicidal fluid of thecomposition any a propriate germicidal fluid'suitable for t e dentaluses may be used either alone or with other fiermicides or medicinalsubstances but I use y choice guaiacol as the particular or principalgermicldal liquid ingredient. With it I refer tomix in solution ananesthetic germicidal compound or anesthetic compound of mild action,preferably an oxyacetic acid compound of guaiacol, or a glycolate, inmixture with the uaiacol, producing at the same time the com ination ofan eflicient anesthetic and a therapeutic germioide, a combinationtherapeutically mild, antiseptic and anesthetic. Dissolved or mixed withthe guaiacol, I prefer to use a gl colic acid ester of guaiacol, such asmet y lycolic acid ester of guaiacol, ethylglycohc acid ester ofguaiacol, or other allied compound of alescing tendency of the wax toform concol. For additional germicidal eflt'ect I use also helenin. Thesolid helenin I dissolve in the germicidal fluid but other suitablesoluble, solid or relatively insoluble germicides or antiseptic ormedicinal substances may be introduced in the composition in small orappropriate percentage or within limits of not interfering with theessential ultimate coalescence of the wax within such limitations asexpressed to follow as to bulk, essentially chemically inert, medicinal,soluble, germicidal or relatively insoluble substances, the kind ofsubstances whether organic or inorganic, germicidal or medicinal,depending according to choice upon the purposes for which thecomposition is used in the tooth cavity. A preferred proportion ofparticular ingredients for the germicidal fluid of the composition isequal parts of guaiacol and guaiacol methylglycolate with addition ofone percent of helenin dissolved therein.

I can make the composition as follows: The parafiine I bring into finelydivided form by agitation while hot or in semi-congealed or meltedcondition. with a suitable, non-solvent fluid such as the above, andcontinue to agitate during the time that the mixture is cooling. Thismay be done directly in a mortar with a pestle, the working beingcontinued until the composition is at the temperature of the atmosphereor nearly so and the wax is finelv divided in suspension or mixturewith'the fluid in a pasty form of composition. For very finely dividedwax a proportion of germicidal flu d content within a range ofthirty-five to fifty percent bv weight of the total compositiongenerally gives the preferred working consistency.

To give greater rigidity of structure, I prefer to use in compositionsolid substances in powder form, or chemically inert substances,chemicallv inert in so far as is essential to be suitable for dentaluses, or other suitable substances in powder form such as calciumphosphate, infusorial earth, or a magnesium silicate, or other harmless,solid, beneficial or medicinal substances. -With the above particulargermicidal fluid stated in definite proportions I can use as anappropriate material for a solid substance in powder form for bulkpurpose, a magnesium silicate. The solid ingredients in powder form maybe incorporated in the composition directly by mixing. The amount ofloose powder introduced should preferably be, in volume of the loosepowder, not more than one and one half times the volume of the spaceoccupied by the wax in melted liquid form. More wax will be best forreadily coalescing.

A better composition containing the solid ingredients introduced inpowder form, I can produce in the followingway whereby a composition isformed having better coguaiacol of milder action than the guaiatinuityor homo eneity and rigidity of structure. The soli substance orsubstances in powder form are first permeated and am 1y coated with thewax or waxy substance before se aration into the finely divided formwith t e fluid into the composition form, that is, when using a bulk orother introduced powder permissible or desirable to coat, I prefer'tocoat the powder with melted wax or parafline and then while in softcondition, add the germicidal fluid to work up with it into thecomposition form of fine division into a paste consistency. The minimumamount of wax or parafline to use is preferably not less than would berequired to fill the interstices of the bulk or introduced powder in thewax volume of intervening spaces and is a proximately determined byordinary calcu ation or by physical means. I prefer to use a quantity oiwax or other coalescing coating substance above this minimum forcertainty of good coalescing tendency.

It is desirable that the wax coated owder be sufficiently cooled to havereached t e congealing point or just a little below the meltingpo1nt,before adding the ermicidal fluid which should likewise be e atemperature at or below the melting point of the particular wax usedwhen it is added to the wax coated powder. If the parafline waxpermeating the powder is in hot, melted, very freely flowing conditionwhen the germicidal fluid is added, or if the fluid is at a temperaturemuch above the melting point of the wax when it is added in pre arationof the composition, there is a ten ency of the wax being replaced by thegermicidal fluid taking its place in working the composition togetherand the parafline is so arated more or less as indlvidual artic es. Thepowder is then not as thorough y coated as desired and the compositionwould revert then mainly or partly to a form of simple mixture.

A s cific composition I can make as follows: take thirty parts by weightof paraffine wax and heat to melt and while in melted, hot and freelflowing condition, add twenty-two parts y weight of a ma nesium'silicate powder and thoroughly wor together so that the powder is toroughly permeated with the wax. The germicidal fluid containingguaiacol, guaiacol meth ,1 glycolate and helenin in the proportionsescribed herein above, is brought to the temperature of the meltingpoint of the wax or a little below that temperature, and'as soon as themixture of wax coated powder has cooled sufliciently to just starttocongeal, forty-eight parts by weight of the germicidal li uid is addedand thoroughly incormay he used, less germicidal fluid used if thickerpasty composition is wanted or if too thick, correspondingly more fluidadded from time to time and incorporated by workin together in a mortarwith a pestle until a esired or a referred consistency for ease ofworking and purposes of use is obtained, which is a matter ofobservation in gradually addin a little more liquid from time to time anworking upinto a preferred consistenc Other powders of medicinal orphysio ogical efl'ect may be worked in at the same time or such powdersmay be contained in the original wax coated powder whereby theirphysiological action or any chemical activity with the fluid ingredientsof the composition may he restricted, if so desired, according to thethoroughness of the coating of the wax on the particles of the powder.

Having thus described and disclosed my invention, I claim as'new anddesire to se cure by Letters Patent 1. A composition of matter forfilling in cavities in teeth, comprising 'parafine in loose form, asilicate powder, and guaiacol.

2 composition of matter for iilling in cavities in teeth, comprisingparadine in loose form, a magnesium silicate and a germicidal fluidsuitable for dental uses, containing a guaiecol glycolate.

3. A composition of matter for fillin in cavities in teeth, com rising amagnesium silicate powder coated with parailine, and a germicidal fluidsuitable for dental uses whose principal liquid germicidal ingredient isgualacol, containing guaiacol methylglycolate dissolved in thegermicidal fluid.

in testimony whereof I have hereunto affixed my signature.

Post ()fioe: Sallie, Mississippi.

PAUL W. KRUGER.

